Introduction

The EA-N66 is a single device with three identities, but at the core is a
dual-band wireless network adaptor with a theoretical speed of 450 Mbps. The
three modes of operation supported by the device are:

Traditional wireless access point

Wireless repeater to receive wireless signal and extend network

Ethernet adapter to connect devices to a wireless network

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The EA-N66 is therefore a bit of a Swiss Army knife in terms of
connectivity, and as it offers dual band 2.4GHZ and 5GHz wireless connectivity,
it should offer both high speeds and good coverage for people wanting to
connect their smart TV, tablets and the bundle of other devices we all seem to
own these days.

What you get for your
money

The retail price for the unit varies between £80 and £100, and therefore is
more expensive than the wireless USB adapters you can get for many devices, but
the design of the EA-N66 should mean you get much better wireless reception,
and with the different modes, a much greater versatility.

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For something so functional, the design of the adapter is pretty amazing,
and for those who like blue lighting when the unit is in use, the unit is
blessed with three blue light strips that point down towards the stone drop
ripple effect on the base unit.

There is no CD, the device is truly self contained with all configuration
happening via the adapters built in web page. You get a small 5V (2A) power
supply, short Ethernet patch lead and the Quick Start Guide, which while it
looks chunky is only so long because of all the languages featured.

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The tripod design has a simple functional use, as each arm houses one of
three wireless antennae. The blue lights are the result of three light pipes
fed by bright blue LED’s on the reverse of the circuit board.

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Connecting the EA-N66
in default Ethernet adapter mode

The default mode is Ethernet adapter mode, which means you can plug the unit
into your TV or any other device with an Ethernet socket.

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When using Ethernet adapter mode, you will need to position the unit in a
location where it can pick up the existing wireless signal, and this is where
using Ethernet to connect back to the device is a boon, as there is no problem
with having a 10m Ethernet cable if needed so the EA-N66 can be in the best
place.

The Ethernet port supports Gigabit, so we should hopefully see very high
throughput speeds in our testing later in this review.

Once you have plugged the Ethernet and power in, then you simply need to
pick the unit up, turn it over and find the slightly hidden WPS button. Hold
the WPS button in until the blue lights start to blink indicating it is trying
to connect to the wireless network using WPS. At this point you need to rush
over to where your wireless router is and press its own WPS button so the two
devices can link together.

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The slightly larger than usual hole in the base of the EA-N66 next to the
WPS button is the reset button which can be reached by using a pin/paperclip.
Just hold the switch in until the blue lights flash to reset the unit back to
factory defaults.

Once the WPS negotiation is complete the lights go back to a solid blue, and
the Ethernet connected device will get a DHCP address from the main router, or
use the static IP address you had previously set it up on.

The blue lights do have a use beyond being a style statement, as in weak
signal areas they will blink and fade to almost off when not connected to any
wireless network.

Using as an Ethernet Adapter without WPS

If your wireless router does not support WPS authentication, you can connect
the EA-N66 using the Ethernet cable to your PC or Mac and navigate to
http://www.asusnetwork.net in your web browser, assuming you are using DHCP
from the device. The username and password by default is admin and after
entering that you can manually set any wireless security parameters, or switch
the EA-N66 to one of the other modes.

When connected directly to a computer, the EA-N66 hands out an IP address in
the range 10.0.1.2 to 10.0.1.254, and if you cannot access the device by its
name it should be visible at http://10.0.1.1 If your computers network
interface is configured to use a static IP address you will need to alter its
configuration to getting its IP configuration automatically (DHCP).

In practice accessing the EA-N66 proved more interesting. Unlike the
majority of network hardware, it appears Asus hardware redirects all the DNS
lookups back to the devices own IP address. The result of this is that on one
machine the EA-N66 configuration pages were very slow to open, but strangely
another machine (also running Windows 7 64 bit was the speed we would expect).
We traced the problem, it appeared to be Windows Live Family Safety,
that was essentially switced off, but by disabling the Windows Service and
rebooting the machine got everything working beautifully.

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Rather than asking for username and password when fresh out of the box we
were invited to set a new admin password, which is always a safe thing to do.
The next step is picking which of the three modes you want to operate in, we
will select the first mode, which is connect to an existing wireless
network.

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The EA-N66 on clicking Next will scan for any visible wireless
networks and you simply need to click on the wireless name of the network you
want to connect to and enter the Security Key.

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Once you click connect the key you provided is used to try and connect to
the network, you are warned that this may take two minutes, which is about the
time it took.

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We would recommend that you check the wireless connectivity, by trying to
access the Internet via EA-N66 while it is still connected to the computer,
before rushing off and plugging it into your TV or blu-ray player.

After the configuration is complete you should notice that your computer is
now getting its IP configuration from your main DHCP router, rather than the
EA-N66. The EA-N66 can still be accessed via http://www.asusnetwork.net if you
want to change any of the settings at a later date.

The settings are stored in the EA-N66 until you reset it to the factory
settings, so you can happily unplug the device and move it to another place in
your home.

While the documentation shows you connecting the EA-N66 in Ethernet adapter
mode to a single computer, there is nothing stopping you connecting it to an
Ethernet switch and using as many devices as the switch supports. We certainly
have used the EA-N66 in this mode, running Netflix on an Xbox 360 while using a
PC to browse the internet at the same time.

Connecting
the EA-N66 in Wireless Access Point (WAP) mode

We recommend connecting via an Ethernet cable for the configuration again,
and going to http://www.asusnetwork.net and selecting ‘I wish to establish a
new wireless network‘ in the Quick Internet Setup.

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When setting up the EA-N66 into Access Point mode you have full freedom to
choose between 2.4GHz and 5GHz modes, and can pick a network name and security
key of your own choosing. The reason 2.4GHz is recommended by the device is
that more devices support the standard Wi-Fi frequency, but with that part of
the spectrum becoming ever more crowded, if your devices support 5GHz we
recommend using that (this does have the downside of less range compared to
2.4GHz.

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Once you click next, the EA-N66 goes into its configuration mode for two
minutes. Once complete the summary page shows what settings you selected, and
also reminds you that you need to switch the Ethernet cable from the computer
to connect to the existing network.

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Changing the access point settings at a later date is very simple, connect
the EA-N66 directly to a computer by an Ethernet cable and access the web
configuration and the network map exposes all the parameters that can be
changed.

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Connecting the
EA-N66 in Wireless Repeater mode

The procedure for configuring this range extender mode is very similar to
the basic Ethernet adapter, and the recommended method is to connect the EA-N66
directly to your computer via Ethernet again. Once connected to the EA-N66 web
interface, select the Quick Internet Setup and choose ‘I wish to extend my
existing wireless network’.

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The scan for visible wireless networks will run, and once complete select
the network you wish to repeat (i.e. extend its range) and enter its security
key.

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By default the EA-N66 will add _RPT to the end of the SSID of the existing
network, and also re-use the security key. If you want to chance the settings
simply un-tick the Use Default setting box and enter what you want. Once
happy with the settings (and if you used a different security key we recommend
making a note of it) clicking Next takes you into the EA-N66’s usual two
minute cycle while it configures itself.

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Once finished you are presented with a summary page that displays your
security key, just in case you had forgotten it. Now is the time to unplug the
EA-N66 from your computer and see if you can connect to it using the correct
wireless network name, and get access to the internet.

The network we extended was a 2.4GHz one, but if we had picked up a 5GHz
network we could have extended that, and the extension would have been in the
5GHz range. Unfortunately it is only possible to extend a network that is in
the same frequency range.

When using repeater mode, remember there is no point placing the EA-N66 too
far from the parent network, as if you do this the EA-N66 will see a weak and
slow signal (blinking blue lights on the EA-N66). We will cover the performance
of the repeater mode later and look at the difference it can make.

One undocumented feature, but very useful one, is that when the EA-N66 is in
repeater mode, the IP network it is connecting to is also visible via the
devices Ethernet port. Which means you can use the EA-N66 to connect a device
that does not have wireless connectivity of its own, at the same time as
extending your wireless network.

IPv6 and the EA-N66

The configuration of the EA-N66 never mentions IPv6 anywhere, but as it just
acts as a transparent IP device mainly, it happily runs on an IPv6 network,
though you will need to still run IPv4 locally to be able to access the device
to configure it.

Performance

Once our initial problems with the EA-N66 were solved, which appears to have
been a conflict with Windows Live Family Safety (the free parental controls
software by Microsoft), the EA-N66 has performed flawlessly. Of course what the
majority of you will be interested in is the performance of the device in its
three operation modes.

Performance as an Ethernet Adapter

This testing is fairly easy, and we have used our standard locations for
testing wireless signals. The source wireless network was provided by an Asus
RT-N66U, which provides both 2.4GHz and 5GHz networks. The PC to PC test
without wireless was used to verify that the Ethernet cable we would use
between the EA-N66 for the actual wireless tests was Gigabit capable.

Figures are an average of both upload and download tests, with so many ways
to use the EA-N66 we wanted to try and avoid too many pages of results. The
base line test of connecting two PC’s via a gigabit Ethernet switch checked
that any cables and computers would not limit the tests, gave us an average
speed of 778 Mbps.

Location

Network Frequency

Average Speed

Top floor

5GHz

96 Mbps

1st floor (nominal 450 Mbps)

5GHz

97 Mbps

Ground floor

5GHz

95 Mbps

Conservatory

5GHz

No signal

Garden Shed

5GHz

No signal

Top floor (nominal 170 to 190 Mbps)

2.4GHz

68 Mbps

1st floor (nominal 217 Mbps)

2.4GHz

56 Mbps

Ground floor (nominal 217 Mbps)

2.4GHz

56 Mbps

Conservatory (nominal 52 Mbps)

2.4GHz

31 Mbps

Garden Shed

2.4GHz

12.5 Mbps

Of course throughput is not everything; many people want to ensure latency
is kept to a minimum. Using the EA-N66 in Ethernet adapter mode linking to a
5GHz network in a location with good signal, latency was a stable 1 ms.

Performance as a Wireless Access Point

Location

Network Frequency

Average Speed

Top floor (nominal 300 to 450 Mbps – varied constantly)

5GHz

83 Mbps

1st floor (nominal 450 Mbps)

5GHz

86 Mbps

Ground floor (nominal 400 to 450 Mbps)

5GHz

71 Mbps

Conservatory

5GHz

No connection

Garden Shed

5GHz

No connection

Top floor (nominal 170 to 190 Mbps)

2.4GHz

41 Mbps

1st floor (nominal 217 Mbps)

2.4GHz

47 Mbps

Ground floor (nominal 217 Mbps)

2.4GHz

44 Mbps

Conservatory (nominal 52 Mbps)

2.4GHz

8.4 Mbps

Garden Shed

2.4GHz

5 Mbps

Performance as a Wireless Repeater

Testing in wireless repeater mode is more complex, and we decided to locate
the EA-N66 at a couple of our usual testing locations and test throughput
through its Ethernet port and the wireless it has created at various
distances.

EA-N66 located on ground floor

Location

Network Frequency

Average Speed

Connected via EA-N66 Ethernet Port on ground floor

2.4GHz

34 Mbps

Direct to Wireless router on ground floor

2.4GHz

46 Mbps

Using extended wireless network close to EA-N66

2.4GHz

20.5 Mbps

Using extended network in Conservatory

2.4GHz

1 Mbps (yes very slow)

Using extended network in shed

2.4GHz

No connection

Connected via EA-N66 Ethernet Port on ground floor

5GHz

105 Mbps

Direct to Wireless router on ground floor

5GHz

79 Mbps

Using extended wireless network close to EA-N66

5GHz

41 Mbps

Using extended network in Conservatory

5GHz

11.9 Mbps

The fact that the wireless signal was so poor horizontally is probably
because three brick walls were in the way, whereas when the wireless router is
on the top floor, the floors are simple floor boards, or for outdoor access
there is just one wall or the roof in the way.

EA-N66 located in Conservatory

Location

Network Frequency

Average Speed

Connected via EA-N66 Ethernet Port in conservatory

2.4GHz

15.6 Mbps

Direct to Wireless router

2.4GHz

6.7 Mbps

Using extended wireless network close to EA-N66

2.4GHz

11.3 Mbps

Using extended network in shed

2.4GHz

14.3 Mbps

Using extended network 10 m beyond shed

2.4GHz

5.8 Mbps

Connected via EA-N66 Ethernet Port in conservatory

5GHz

15.3 Mbps

Direct to Wireless router

5GHz

3.7 Mbps

Using extended wireless network close to EA-N66

5GHz

8.8 Mbps

Using extended network in shed

5GHz

2.5 Mbps

The improved performance when utilising the EA-N66 shows that the antenna of
the EA-N66 are making a difference, and the range of the network has been
extended some 10m further down the garden.

EA-N66 Located in Shed

Location

Network Frequency

Average Speed

Connected via EA-N66 Ethernet Port in shed

2.4GHz

9.9 Mbps

Direct to Wireless router

2.4GHz

Pings but not able to run speed tests

Using extended wireless network close to EA-N66

2.4GHz

12.9 Mbps

Using extended network 10m from shed

2.4GHz

8.8 Mbps

Using extended network 20 m beyond shed

2.4GHz

3.7 Mbps

Using extended network 30 m beyond shed

2.4 GHz

3.5 Mbps

Using extended network 40 m beyond shed

2.4GHz

.3 Mbps

This is the best wireless coverage I have ever had in this garden, and there
were plenty of shrubs in the way, so over open ground you may be able to get a
better throughput or longer range. The reason we did no testing at 5GHz was
because in the shed there was no useful 5GHz signal available to extend.

Conclusions

The performance of the 5GHz capabilities in terms of having shorter range
than 2.4GHz is to be expected. The wireless performance as an access point was
a little below what we have seen from the best kit, but still very good. High
street prices at the time of the review are running around £80 to £100.

Overall the flexibility of the EA-N66 is the key to its usefulness. We
suspect that many people will use it in repeater mode, which has the advantage
of also supporting a connection via Ethernet at the same time.

The performance in extending a 2.4GHz network was impressive, but our
testing also reveals that you need to experiment with positioning to find the
most optimal position.

The variety of choices now for people wanting to ensure their house is
totally covered by broadband are expanding, and while devices like the echoBox
and HomePlugs are great, with the rise of the smartphone and tablet, the need
for good wireless in every room, means that range extenders like the EA-N66 are
a common requirement. The proof that the EA-N66 is a good choice was that when
our laptop could not runs tests across the parent network, we still managed 9
to 13 Mbps over the EA-N66. This speed is more than adequate for streaming
Netflix or BBC iPlayer onto a tablet.